Αποτελέσματα 1-6 από 6
Local strain re-distribution and stiffness degradation in cross-ply polymer composites under tension
Individual aramid Kevlar® 49 fibers were embedded into the 0° ply of transparent cross-ply glass fiber reinforced polymer (GFRP) laminates and used as Raman sensors for the monitoring of the local strain field due to matrix ...
Matrix cracking in polymeric composites laminates: Modelling and experiments
Composites ability to retain functionality in the presence of damage is a crucial safety and economic issue. Generally the first damage mode in composite laminates is matrix cracking, which affects the mechanical properties ...
Raman spectroscopy investigation of stiffness change and residual strains due to matrix cracking
The matrix cracking models developed for cross-ply composite laminates have been poorly extended in the past to more complex geometries used in practice, and they are still under development. In this paper, a new detailed ...
Energy criterion for modelling damage evolution in cross-ply composite laminates
The energy dissipated in cross-ply laminates during loading–unloading loops is obtained from stress–strain curves for cross-ply laminates and used in an energy based approach to predict the development of matrix cracking. ...
Analysis of matrix cracking in GFRP laminates using Raman spectroscopy
A Raman spectroscopic technique was used to investigate the elastic modulus degradation and the residual strain development in cross-ply and [0/452/0]T glass fibre/epoxy laminates. Glass has a poor Raman signal and, ...
Effect of Off – Axis Matrix Cracking on Stiffness of Symmetric Angle-Ply Composite Laminates
Matrix cracking models developed for cross-ply composite laminates cannot easily be applied to more complicated geometries. In this paper a detailed analysis of the effect of matrix cracking on the longitudinal Young’s ...